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Vintage Tape (Audio), Cassette, Wire and Magnetic Disc Recorders and Players Open-reel tape recorders, cassette recorders, 8-track players etc.

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Old 5th May 2019, 8:14 pm   #81
Ted Kendall
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Join Date: Jul 2008
Location: Kington, Herefordshire, UK.
Posts: 1,515
Default Re: Ferrograph 4A: Restoration advice needed

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Originally Posted by Uncle Bulgaria View Post
On mine the screws are not tensioned...adding washers as shims seems the only option. From the quality of the rest of the machine, this lack of precision seems unlikely!
Apologies - touch of brain fade. I'd say shimming is the way to go. The Ferro has never struck me as a particularly precision device, more a design centred on dependability, which given its origin as Admiralty-specified equipment, would make sense. That, and the fact that it was conceived when the sub-studio state of the art otherwise was the Brush Soundmirror...
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Old 5th May 2019, 8:23 pm   #82
BillDWVA
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Join Date: Nov 2010
Location: Tenby, Pembrokeshire, Wales, UK.
Posts: 103
Default Re: Ferrograph 4A: Restoration advice needed

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Originally Posted by Uncle Bulgaria View Post
Quote:
Originally Posted by Ted Kendall View Post
Yes. You can adjust the shaft tilt by the three tensioned mounting screws of the spooling motors.
On mine the screws are not tensioned, except by the weight of the motors hanging off them when the machine is lying down. The screws each thread into hex standoffs that butt up against the top plate, and have their other end connected to the long hex screws that hold the rotor bearings and motor assembly together.

The standoffs are all the same length, so adding washers as shims seems the only option. From the quality of the rest of the machine, this lack of precision seems unlikely!
You are correct; the motors are adjusted so that their spindles are square to the top plate by adding or removing washers under the hex standoffs. From my experience of replacing the take-up motor on a Series 4 it is a bit of a faff to slip extra washers in and I resorted to coating them with grease to ‘stick’ them into place whilst I got the screw back in.
Note that you can adjust the reel adaptor height by undoing the tiny socket head locking screw in the hub. 1/16” Allen key needed.

Bill
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